CFD Simulation of external distribution of tail-pipe emissions around a stationary vehicle under light tail-wind conditions

E.F. Abo-Serie, M. Sherif, D. Pompei, A. Gaylard

Research output: Contribution to journalArticle

Abstract

A potentially important, but inadequately studied, source of passengers' exposure to pollutants when a road vehicle is stationary, with an idling engine, results from the ingestion of a vehicle's own exhaust into the passenger compartment through the HVAC intake. We developed and applied a method to determine the fraction of a vehicle's exhaust entering the cabin by this route. Further the influence of three parameters: ambient tail-wind speed, vehicle ground clearance and tail pipe angle, is assessed. The study applies Computational Fluid Dynamic (CFD) simulation to the distribution of exhaust gasses around a vehicle motorized with a 2.2 liter Diesel engine. The simulation employs efficient meshing techniques and realistic loading conditions to develop a general knowledge of the distribution of the gasses in order to inform engineering design. The results show that increasing tail-wind velocity, tail-pipe angle and ground clearance reduces the presence of CO and NO at the HVAC intake. The trends for NO2 are not predicted to follow the same pattern.
Original languageEnglish
Article number2014-01-0586
Number of pages7
JournalSAE Technical Papers
Volume1
DOIs
Publication statusPublished - 1 Apr 2014
EventSAE World Congress 2014 - Detroit, United States
Duration: 8 Apr 201410 Apr 2014

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